CI: update python versions on the lint job

'ubuntu-latest' image does not have python==3.8 anymore

Author: ev-br

.github/workflows/lint.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.8, 3.9]
+        python-version: ["3.10", "3.11"]
 
     steps:
     - uses: actions/checkout@v1